The PocketFinder is the simplest to use of the personal GPS locators that we've tested, requiring no interaction from the user on a day-to-day basis, but you'll pay a bit more in the long run for that.

Motorola's incredibly capable MotoActv fitness device can tackle just about any fitness task--such as tracking workouts via GPS and connecting to headsets via Bluetooth--and it serves as a very tiny digital music player. Yet, if you're looking for a simple tool to measure daily activity and provide holistic advice on how to shed some pounds, this training tool isn't for you.